Typical Weather in Helena, MT in May
66° F Avg High
41° F Avg Low
5 Rainy Days
☀️ Temperature Summary
Highs in May are typically around 66°F, which is warmer than usual in Helena. Lows overnight are typically around 41°F. Daily high temperatures can range between 63°F and 72°F, and will often rise as the month goes on.
May is a great time to visit Helena, with mild temperatures and sunny days being very common.
High Temps Throughout the Year
☔ Rain Summary
You can expect about a 17% chance of rain for any given day in May. It's one of the rainier months of the year for Helena, with total rainfall for the month around 2 inches.
Rainfall Throughout the Year
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